25 Feb 1941HrMs O 10 (Lt. J.H. Geijs, RNN) suffers from engine failure. She parted with the convoy and made for Tobermory escorted by HMS Pentland Firth (Skr. H.C. Aisthorpe, RNR) where she arrived late on this day. (1)

20 Nov 1942 (position 13.05, -25.50)While en route to the USA to be refitted at the Philadelphia Navy Yard, HrMs K XIV (Lt.Cdr. J.H. Geijs, RNN) attacked German U-boat U-552 south of the Cape Verde Islands in position 13°05'N, 25°50'W. At a distance of around 900 meters K XIV launched four torpedoes. The old torpedoes from the Netherlands East Indies ran close to the surface and were detected by the Germans an missed their target as the U-boat turned away.

23 Nov 1942 (position 17.28, -34.13)HrMs K XIV (Lt.Cdr. J.H. Geijs, RNN) had an encounter with the Dutch merchant vessel Kota Tjandi in position 17°28'N, 34°13'W. The crew of the submarine thought the merchant vessel was a German blockade breaker and the crew of the merchant vessel thought the submarine was a German u-boat. Neither ship was damaged in the encounter.